David Walsh Blog

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    IP Geolocation and Threat Intelligence API: ipdata

    An IP address is a simple, numeric piece of information that gets passed to a server, but that IP address can provide a wealth of information with ipdata. With ipdata you can learn user location, language, currency, and much more!Quick Hitsipdata is an...

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    Fantastic Flight API with aviationstack

    I didn't fly until I was 25 years of age -- I was hopeless in knowing I had to be there early, the process of security, and the whole gate structure. Now that I've flown dozens of times for Mozilla, I feel much more comfortable...

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    Duplicated Argument Names

    Oftentimes we override or monkey patch functions and, in many cases, there are arguments we don't care too much about. A common practice for those arguments is using _ for argument names -- it's a generally accepted and known practice for "this isn't important".

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    Validate CSP from Command Line

    The content security policy spec has been an amazing front-end security tool to help prevent XSS and other types of attacks. I'd go as far to say that every site should implement as specific CSP as possible. If you aren't familiar with CSPs...

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    Goals For 2020

    Every new year brings about a sense of optimism that the next 365 can bring about big, positive changes in different phases of life. That's no exception for me and this blog. I did pretty well with last year's goals, so I thought I'd push...

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    2019 Year in Review

    The beginning of every year starts out with all of us setting ambitious goals -- goals being personal and professional. Many of us rarely complete half of those goals, most abandoning them by the end of the year. In January of this year I...

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    Mirror Android Device to Computer

    As I continue my adventure into Android development, pair programming has been a huge help in learning this new platform. When it's time to build and run the app, relying on the emulator is a fools' game -- the emulator is slow and it's hard to...

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    Image Lazy Loading

    Lazy loading images is a practice that's been popular for a decade and for good reason: images are usually the heaviest downloads on a given webpage and avoiding unloading images that are never seen saves the user bandwidth. There are plugins for lazy loading images in...

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    Getting Started with GraphQL

    GraphQL was developed by Facebook in 2012 to power up its mobile apps. Since open-sourcing GraphQL specification in 2015, it gained a lot of popularity and is now used by many development teams, including giants like GitHub, Twitter or Airbnb. Why so? And what exactly...

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    Real-Time Google Search Results API with serpstack

    In my early web days, I was interested in scraping and collecting data based on the results of Google searches. Scraping Google was easier in those days but now Google search results are so dynamic that you can't rely on getting the same HTML or data...

Popular Features

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    Interview with a Pornhub Web Developer

    Regardless of your stance on pornography, it would be impossible to deny the massive impact the adult website industry has had on pushing the web forward. From pushing the browser's video limits to pushing ads through WebSocket so ad blockers don't detect them, you have...

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    Welcome to My New Office

    My first professional web development was at a small print shop where I sat in a windowless cubical all day. I suffered that boxed in environment for almost five years before I was able to find a remote job where I worked from home. The first...

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    How to Create a RetroPie on Raspberry Pi – Graphical Guide

    Today we get to play amazing games on our super powered game consoles, PCs, VR headsets, and even mobile devices.  While I enjoy playing new games these days, I do long for the retro gaming systems I had when I was a kid: the original Nintendo...

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    Conquering Impostor Syndrome

    Two years ago I documented my struggles with Imposter Syndrome and the response was immense.  I received messages of support and commiseration from new web developers, veteran engineers, and even persons of all experience levels in other professions.  I've even caught myself reading the post...

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    Being a Dev Dad

    I get asked loads of questions every day but I'm always surprised that they're rarely questions about code or even tech -- many of the questions I get are more about non-dev stuff like what my office is like, what software I use, and oftentimes...

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    JavaScript Promise API

    While synchronous code is easier to follow and debug, async is generally better for performance and flexibility. Why "hold up the show" when you can trigger numerous requests at once and then handle them when each is ready?  Promises are becoming a big part of the JavaScript world...

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    7 Essential JavaScript Functions

    I remember the early days of JavaScript where you needed a simple function for just about everything because the browser vendors implemented features differently, and not just edge features, basic features, like addEventListener and attachEvent.  Times have changed but there are still a few functions each developer should...